Kaettekita! Girigirigâru!

On a warm summer day, three children mix up a potion in their backyard. After leaving the various ingredients to brew in a large tub, they return to discover the surprising results of their concoction.

In this imaginary world, a family's daily activities are shaped by the reality beyond their apartment walls.

The film is about under the background of great migration and urbanization in China, this film focuses on the troubles in migrant workers' life due to household registration system. Because of the household registration system, although the Chinese government allows people in rural or poor areas to move to developed or large and medium-sized cities, the migrants actually have not been treated fairly as their children cannot even study in the city where they work.And their schools were demolished, they were expelled from the big cities.

For the first time, Biubiu spends his holiday with his grandmother and uncle in the country. Everything is so different there, he is even told to eat fried insects. But even worse is that the boys from the village don't play with him. But Biubiu does not let himself be shaken off.